Being as there are rules sbout drafted players, I think you should have to declare the 7 drafted players on your team either way. Seapilots, I think you should amend/clarify the rules to address this matter in the future.

We had an issue last season when an owner dropped out after rd. 5 and the team only had 5 when draft ended.
dh took the team as a 2nd and filled it with 7 undrafted.
Technically Sly your within the rules only drafting 6 players. However cmcafeeky can't have 8 draft picks.
So at the moment the trade needs to be amended.